Hacker News Reader

You need to wait a few seconds (5-ish) for the data to populate once you've selected a region on the map.

Here's the link if you want to skip the article:

Perhaps the map is getting hugged to death right now? I can't get any data to load beyond the base geo layer.

EDIT: hmmm, seems to be a bug. I see in the console it's expecting JSON from this url: https://maps.bts.dot.gov/services/rest/services/Noise/CONUS_...

...MapServer?f=json does have JSON! It's just even when it errors it returns a successful response with the error page that's not JSON.